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esp_ble_gattc_register_for_notify() function
Register to receive notification/indication of a characteristic.
Syntax
esp_err_t esp_ble_gattc_register_for_notify (esp_gatt_if_t gattc_if,
esp_bd_addr_t server_bda,
uint16_t handle);
Implemented in ![]()
esp_gattc_api.c:805
Return value
- ESP_OK: Success - ESP_GATT_INVALID_HANDLE：Invalid `handle` - ESP_FAIL: Failure due to other reasons
Notes
1. This function triggers `ESP_GATTC_REG_FOR_NOTIFY_EVT`. 2. You should call `esp_ble_gattc_write_char_descr()` after this API to write Client Characteristic Configuration (CCC) descriptor to the value of 1 (Enable Notification) or 2 (Enable Indication). 3. `handle` must be greater than 0.